Hi - didn't spot anything major wrong with the config.plist but I made two changes. Don't know if it will make a difference, in the UEFI/AppleInput/InitialDelay entry should be 50 but you had 0. Also I added AudioDxe.efi Driver so you will need to add the Driver (attached) to the Drivers Folder. This enables the Boot Chime at start up like a real Mac but you can always turn the feature off if you don't want it.
When you load this amended config.plist, reboot and clean the NVRAM, this is very much a required exercise to remove remnant settings from the memory. Good luck.
PS - Remember to replace your machine's data to the config. plist before loading.